User Input

std::cin, which stands for character input, reads user input from the keyboard.

std::cin >> variable;

Here, the user can enter a value in the terminal, press enter, and that number will get stored in the variable.

In this example, the program will prompt the user to enter a number with "Enter amount: ". Then the user can enter a number, press enter, and that number will get stored in the variable tip.

#include <iostream>

int main() {
  int tip = 0;

  std::cout << "Enter amount: ";
  std::cin >> tip;

  std::cout << "You gave a tip of $" << tip << "\n";
}